[boost] Library format required for inclusion in Boost

Hi, I'd like to ask a few questions about what libraries that wish to be included into Boost must look like, and I would like to know whether libraries need to fulfill those requirements for the review or can do so later. Build system: integration with Boost.Build is necessary, additional CMake scripts is a plus. Documentation: the Boostbook toolchain seems recommended, but not necessary. Is that correct? How free are we? Does the documentation necessarily need to be generated with Boost.Build as well? Test system: something that the regression test suite can eat. What is that format? Is that restricted to Boost.Test run through Boost.Build?